Predicating method for TLE (transfer line exchanger) outlet temperatures and operation cycles of ethylene cracking furnaces

Abstract

The invention relates to a predicating method for TLE (transfer line exchanger) outlet temperatures and operation cycles of ethylene cracking furnaces. The deducing of TLE heat transfer processes of industrial ethylene cracking furnaces is simplified, and is combined with empirical models of TLE coking and depositing of the industrial ethylene cracking furnaces so as to deduce parameterized prediction models of the TLE outlet temperatures and the operation cycles of the industrial ethylene cracking furnaces. Actual production data are utilized to estimate and identify model parameters, time factor corrections are performed on the identified models additionally, and online and real-time correction updates can be carried out on the TLE outlet temperature parameterized prediction models as required to expand adaptability and accuracy of the models. When TLE maximum permission upper limits and maximum operating cycles are given, the TLE outlet temperature parameterized prediction models can be used for predicating follow-up operating time of TLE systems before next decoking online and predicating the TLE operating cycles. The predicating method is simplified, reasonable in deducing, high in construction applicability, simple to operate, easy to copy, and wide in adaptability.

Description

technical field [0001] The invention relates to a TLE (Transfer Line Exchange, hereinafter referred to as LTE) outlet temperature and operation period prediction method of an ethylene cracking furnace. Background technique [0002] The ethylene industry occupies the core position of the petrochemical industry, and the ethylene output is a symbol to measure the development level of a country's petrochemical industry, so the daily operation and optimization of the cracking furnace is very important. According to the operating characteristics of the cracking furnace, the cracking reaction process and cracking reaction products will coke in the reactor tube and TLE tube, and the cracking furnace needs to be shut down regularly to clean the coke to ensure that the cracking furnace and waste heat boiler operate at a higher efficiency and ensure that the ethylene The yield of key products such as propylene and propylene will not be affected. Judging whether the cracking furnace in...

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Problems solved by technology

Through literature search, it is found that there is no precedent for the implementation of this aspect in the current industrial application. Therefore, the historical data of field operation and the theoretical analysis and derivation of the system are fully utilized, combined with data mining and parameter estimation technology, to develop the outlet temperature and operating cycle of the industrial ethylene cracking furnace TLE Predictive technology matters

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